LED cooling technology and cooling materials

LED cooling technology and cooling materials

Heat dissipation is a major factor affecting the intensity of LED lighting. Heat sink can solve the problem of heat dissipation of low illumination LED lamps. A heat sink can not solve the 75W or 100W LED lighting cooling problem.
In order to achieve the desired illumination intensity, active cooling technology must be used to solve the heat released by the LED lamp assembly. Some active cooling solutions such as fan life are not high for LED lamps. In order to provide a practical active cooling solution for high brightness LED lamps, the heat dissipation technology must be low energy consumption; and can be applied to small lamps; its life is similar to or higher than the light source.

LED cooling technology and cooling materials

Cooling method

Generally speaking, in accordance with the way from the radiator to take away the heat, the radiator can be divided into active cooling and passive cooling. The so-called passive heat, is through the heat sink heat source LED light source naturally distributed to the air, the cooling effect is proportional to the size of the heat sink, but because it is naturally distributed heat, the effect of course greatly reduced, often used in those space No demand for the equipment, or for the heat of the parts of the heat dissipation, such as some popular motherboard in the North Bridge also take a passive cooling, the vast majority of take the initiative to heat, active cooling is through the fan and other cooling equipment forced The heat will be sent out of the heat sink, which is characterized by high thermal efficiency, and equipment, small size.

Active cooling, subdivided from the way heat can be divided into air-cooled heat, cooling heat, heat pipe cooling, semiconductor refrigeration, chemical refrigeration and so on. LED cooling technology and cooling materials

Air-cooled air cooling is the most common way of cooling, in comparison, is also cheaper way. Air cooling is essentially a fan that takes away the heat absorbed by the radiator. With the price is relatively low, easy installation and so on. But the environmental dependence is relatively high, such as the temperature rise and overclocking its thermal performance will be greatly affected.

Liquid cool

Liquid cooling heat is driven by the liquid in the pump driven by the heat to take away the radiator, compared with the air-cooled, with a quiet, cooling stability, the advantages of small dependence on the environment and so on. The price of liquid cooling is relatively high, and the installation is also relatively cumbersome. At the same time as installed in accordance with the instructions to install the instructions in order to get the best cooling effect. For cost and ease of use considerations, liquid cooling heat is usually used as a heat-conducting liquid, so liquid-cooled radiators are often referred to as water-cooled radiators.

Heat pipe

The heat pipe is a kind of heat transfer element which makes full use of the heat conduction principle and the rapid heat transfer property of the refrigerant. It conveys heat by evaporation and condensation of the liquid in the fully enclosed vacuum tube, has extremely high thermal conductivity, good isothermal The heat transfer area on both sides of the hot and cold can be arbitrarily changed, can be a long distance heat transfer, can control the temperature and a series of advantages, and heat pipe composed of heat exchanger with high heat transfer efficiency, compact structure, advantage. Its thermal conductivity has far exceeded the thermal conductivity of any known metal. LED cooling technology and cooling materials